Dyfyniad APA

Thirlwall, A. P. (1994). Growth and development (5th ed.). Macmillan.

Dyfyniad Arddull Chicago

Thirlwall, A. P. Growth and Development. 5th ed. United Kingdom: Macmillan, 1994.

Dyfyniad MLA

Thirlwall, A. P. Growth and Development. 5th ed. Macmillan, 1994.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.